The identity formation period and how its not the same for all of us, all gay men are not created equal. That for some homosexuality is their total being, for others it's just another part of the puzzle that they are along with liking chocolate, or playing sports, or being a great writer, etc. No matter which fits for a person, all of it is good.

That society has convinced itself of certain stereotypes, like that we're all just sex hungry, good looking, clean, organized, fashionable, non athletic (except in sports like distance running, swimming and gymnastics) men.

That relationships (friendships, romantic) are complicated and can be even more complicated by homosexuality, but no matter what there are tons of people out there experiencing the same thing (or something similar); gay, straight, bisexual. You're not alone and that the most important and essential thing you can do is to build relationships that are meaningful and honest.

Essential - 'safe sex' methods described in detail. Sexual types of gayness discussed, i.e. some are tops, some are bottoms, some just want mutual jo or oral. You can't make assumptions about what 'gays' are into sexually.

Nice - descriptions of the variety of ways that gayness manifests itself - from the 'Drag Queen' to the 'Broke Back Cowboy'. From the open relationship to the committed couples. Gay rights history. Appendix listing resources either national or local for GLBT causes and counselling.

Exclude - chapter outlining ways to seduce a straight guy, chapter on 101 ways to live on the down low.

I like OHhiker's book. That sounds like much of what I'd include, although I'd be inclined to add a lot of history - from ancient Greece to the middle ages, to Victorian England and non-white world, and then Stonewall and modern times. To communicate to young homos the context from which ideas about modern sexuality have arisen. I'd also talk about the effect of class, religion and race on sexual orientation and sexual development.